It’s good you have the option to sell. That might be an opportunity to do it earlier than you anticipated but perhaps for the best! We sold our btl earlier this year, was a relief tbh. We used an estate agent but it fell through once and then the second time was ok. Still took 5 -6 months though, in West London.
I think if we sold again I’d be tempted to use one of those firms that buy within days, no messing about. Obv you get a bit (10%??) less than you would with an EA, but the speed and less stress could be worth it.
Anyway good luck, it might be a blessing in the end!